NEW TO BRITAIN IN 1880. 



209 



Euastrum gemmatum, Breb. 



„ elegans, Breb. 



* „ erosum, Lund. 

 ^Cosmarium pseudoconriatum, Nordst. 



„ ornatum, Ealfs. 



„ cucurbita, Breb. 



„ coelatum, Ealfs. 



„ undulatum, Corda. 



„ hotrytis, Bory. 



„ cucumis, Corda. 



^ ,, pseudonitidulum, Nordst. 



^ „ tetrachondrmm, Lund. 



„ phaseolus, Breb. 



^ „ cyclicum, Lund. 



^ ,, variolatum, Lund. 



^ „ Nymannianum, Grun. 



^ „ truncatellum, Perfcy. 



^ „ Holmiense, Lund. 



^ „ quadrum, Lund. 



^ „ galeritum, Nordst. 



^ ,, orthostichum, Lund. 



„ granatum, Breb. 



„ lesve, Eabh. 



J,. „ splialerotrichum, Lund. 



^ ,, glohosum, Buln. 



^ „ coronatum, Cke. & Wills. 



^ „ ca7?ihricum, Cke. & Wills. 



Xanthidium ar^natum, Breb. 



„ jasciculatimi, Ebr. 



Arthrodesmus incus, Breb. 

 „ octocorne, Ehr. 



„ convergens, Ehr. 



'^Staura strum Bmsiliense, Nordst. 

 ^ „ arctiscon, Ehr. 



^ „ ojphiura, Lund, 



u, „ cerastes. Lund. 



^Siaurastrum aversum, Lund. 

 ,, gracile, Ealfs. 



„ dejectum, Breb. 



„ vestitum, Ealfs. 



^ „ grande, Lund. 



^ „ longispinum, Bailey. 



„ aristiferum, Ealfs. 



,, arachne, Ealfs. 



.j^. ,, pseudofurcigerum, 



Eeinsch. 

 ;(; ,, Sebaldi, Eeinsch., va- 



riety. 

 ^ „ anatlman, Cke. & 



Wills. 

 ,, tetracerum, Kutz. 



„ furcigerum, Breb. 



„ cuspidatum, Breb. 



„ muticum, Breb. 



„ margaritaceum, Ehr. 



^ „ Pringsheimi, Eeinsch. 



,, paradoxum, Meyen. 



„ punctulaUmi, Breb. 



,, hirsutum, Ehr. 



5^ ,, megacanthuniy Luud. 



,, inflexum, Breb. 



„ cristatum, Breb. 



Penium digitus, Ehr. 



,, cylindriis, Ehr. 

 Tetmemorus granulatus, Breb. 

 *Docidium nodosum, Bailey. 

 „ haculum, Breb. 

 „ Ehrenhergii, Ealfs. 

 Closterium setaceum, Ehr. 

 „ lunula, Mull. 



,, didi/motocum, Corda. 



„ cornu, Ehr. 



Finally, to give a practical turn to these hurried notes, permit me 

 for a few moments to advert to the subject of mounting Desmids for 

 the microscope. This has always been a great difficulty, but perhaps 

 magnified too much. Let us ask ourselves what really is the most 

 important object to be secured in mounting Desmids, and in 

 answer I must say that I place less importance on the preservation 

 of the endochrome and its colour than do those who mount pretty 

 objects for the drawing-room. For scientific purposes the empty 



